
| APR | MAY | JUN | JUL | AUG | SEP | |||||||||||||||||||||
| Week no. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| Site | ||||||||||||||||||||||||||
| Small Skipper | . | . | . | . | . | . | . | 1 | . | . | 42 | 106 | 128 | 59 | 90 | 32 | 11 | 1 | . | . | . | |||||
| Large Skipper | . | . | . | . | . | . | . | . | 23 | 44 | 40 | 18 | 23 | 9 | 6 | 4 | . | . | . | . | . | |||||
| Dingy Skipper | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Grizzled Skipper | . | . | . | . | . | . | 1 | 2 | 1 | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Wood White | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | |||||
| Brimstone | 2 | 7 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | 8 | 2 | 1 | |||||
| Large White | . | . | 1 | . | 1 | 2 | 5 | 3 | 5 | . | . | 3 | 7 | 1 | 9 | 4 | 6 | 5 | 4 | 3 | . | |||||
| Small White | . | . | . | . | 3 | 1 | . | . | . | . | . | . | . | . | . | 18 | 78 | 20 | 35 | 15 | 2 | |||||
| Green-veined White | . | . | 1 | 4 | 5 | 3 | 4 | . | 1 | . | . | . | . | 10 | 2 | 5 | 15 | 5 | 2 | . | . | |||||
| Orange Tip | . | . | . | . | 2 | 2 | 3 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Brown Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | |||||
| Purple Hairstreak | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | |||||
| Small Copper | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | . | . | . | |||||
| Common Blue | . | . | . | . | . | . | . | 2 | 4 | 2 | 1 | . | . | . | . | 1 | 6 | 1 | 8 | . | . | |||||
| Duke of Burgundy Fritillary | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| White Admiral | . | . | . | . | . | . | . | . | . | . | 1 | 3 | 3 | 1 | . | . | . | . | . | . | . | |||||
| Purple Emperor | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | . | . | . | . | . | . | . | |||||
| Red Admiral | . | . | . | . | . | . | . | . | 1 | . | . | . | . | . | . | . | . | . | 1 | 1 | . | |||||
| Small Tortoiseshell | . | 1 | . | . | . | . | . | . | . | . | . | . | . | . | . | . | 1 | . | 1 | 3 | 2 | |||||
| Peacock | 2 | 5 | 2 | . | . | . | . | . | . | . | . | . | . | . | . | . | 16 | 13 | 6 | 1 | . | |||||
| Comma | 3 | 1 | 1 | . | . | . | . | . | . | . | . | . | 1 | 2 | . | . | . | . | 10 | 2 | 2 | |||||
| Pearl-bordered Fritillary | . | . | . | . | . | 4 | 12 | 11 | . | . | . | . | . | . | . | . | . | . | . | . | . | |||||
| Marsh Fritillary | . | . | . | . | . | . | 5 | 2 | 4 | 1 | . | . | . | . | . | . | . | . | . | . | . | |||||
| Speckled Wood | . | . | . | 1 | 3 | 3 | 1 | . | 3 | 1 | 2 | 4 | 3 | 2 | 1 | 4 | 4 | 21 | 33 | 32 | 5 | |||||
| Marbled White | . | . | . | . | . | . | . | . | . | . | 4 | 30 | 32 | 24 | 11 | 1 | 1 | . | . | . | . | |||||
| Gatekeeper/Hedge Brown | . | . | . | . | . | . | . | . | . | . | . | 2 | 2 | 6 | 15 | 20 | 16 | 6 | 5 | 1 | . | |||||
| Meadow Brown | . | . | . | . | . | . | . | . | . | 11 | 23 | 36 | 47 | 40 | 34 | 14 | 1 | . | . | . | . | |||||
| Small Heath | . | . | . | . | . | . | 5 | 8 | 8 | 5 | 5 | 1 | . | . | . | . | 3 | 2 | 4 | 2 | 4 | |||||
| Ringlet | . | . | . | . | . | . | . | . | . | 3 | 49 | 89 | 169 | 68 | 70 | 27 | 8 | 1 | . | . | . | |||||